Service system notifying dangerous situation through linkage between mobile terminal and set-top box

A service system for providing notification of a dangerous situation, the system comprising:

• a protected person side set-top box;
• a protector side set-top box;
• and
• a service providing server which controls the protector side set-top box linked to a protector side mobile terminal to provide a notification message corresponding to a danger signal to a protector when the danger signal regarding occurrence of the dangerous situation of a protected person is received from the protected person side set-top box and/or a protected person side mobile terminal,
• wherein the protected person side set-top box and the protected person side mobile terminal are linked to one another;
• wherein the service providing server transmits the notification message to the protector side set-top box to output the notification message to an image output device connected to the protector side set-top box;
• wherein when a power state of the image output device is ON or the power state of the image output device is switched from OFF to ON, the service providing server checks an external input status of the image output device, and when the external input status of the image output device is a different port from a communication port between the protector side set-top box and the service providing server as a result of checking the external input status of the image output device, the service providing server transmits a first control signal for changing the external input status to the communication port to the protector side set-top box so that the notification message is output to the image output device;
• wherein the service providing server checks a mode state of the protector side set-top box and the power state of the image output;
• and
• wherein when the mode state of the protector side set-top box is a standby mode, the service providing server transmits a second control signal for switching the mode state of the protector side set-top box to an operation mode to the protector side set-top box and when the power state of the image output device is OFF, the service providing server transmits a third control signal for switching the power state of the image output device to ON to the protector side set-top box.